CDK5 and glioblastoma: Cdk5 inhibition by TP5 (Tabouret et al., 2020), AC1MYR2 (Ren et al., 2015), inhibition of DYRK1A (Chen et al., 2021), Cdk5 knockdown (Zhou et al., 2021), and a new quinazolinone family (Peyressatre et al., 2020a) can suppress the progression of GBM.